"Mathematics: Pool volume. One Olympic pool design is 25 metres wide and 50 metres long. The pool is 3 metres deep at the starting end of the pool and slopes down (linearly) to 2 metres deep at the far end of the pool. How many litres of water are needed to fill this pool?."

"An Olympic Pool must be 25 m wide with a depth of 2.0 m (min) at all parts of the course and must be 50 m in length."

2,500,000 liters

Ever wonder how much water it takes to fill up an entire swimming pool? I know
I did. That's why I did some research to come up with that information and now
I am sharing that information with you.

The volume of a swimming pool is quite simple to determine. Every pool has
certain measurable factors; however, these factors differ depending on
the shape of the pool. The most common and most basic is the rectangular
swimming pool. To determine the volume of rectangular pools, multiply the
length of the pool by its width and by its average depth. For a circular
pool, multiply the squared radius of the pool by π (pi) and by its average
depth. For an elliptical pool, multiply π/4 by the major diameter, minor
diameter, and average depth. For irregular shapes, calculating the volume
is less accurate. You will need to determine of volume of a normal shape
within the given area and then approximate the volume of the remaining
parts of the pool. Volume of a swimming pool is given in units of cubic meters, liters, or gallons.